C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
C23F 11/12 (2006.01) C23F 11/08 (2006.01) C23F 11/10 (2006.01) C23F 11/14 (2006.01)
Patent
CA 2087393
Abstract of the Disclosure Corrosion Inhibiting Compositions A corrosion inhibiting composition comprising: A) 40-90% by weight of a carboxylic acid corrosion inhibitor, or a water-soluble salt thereof, comprising one or more of: A1) a triazine-carboxylic acid of formula I: I Image in which Z is a C1-C11 alkylene group, Rl and R2, independently, are hydrogen ormethyl, and R3 is a group -NR4R5 in which R4 is C1-C12 alkyl or-Z-COOH in which Z has its previous significance, and R5 is hydrogen or C1-Cl2 alkyl, or a water-soluble salt thereof; A2) a sulphonamidocarboxylic acid of formula II: Image II in which R6 and R7, independently, are hydrogen or C1-C4 alkyl, and m is an integer ranging from 1 to 10 or a water-soluble salt thereof; and A3) a dicarboxylic acid, or mixture thereof, having the formula III: HOOC-(CH2)n-COOH III in which n is an integer ranging from 4 to 12, or a water-soluble salt thereof; B) 10-60% by weight of one or more aminobenzoic acids having the formula IV: Image IV in which R8 is hydrogen or a group of formula V orVI: Image V Image VI or one or more water-soluble salts thereof; C) 0-10% by weight of an alkanolamine of formula VII: NR9R10R11 VII in which R9, R10 and R11, independently, are hydrogen, a linear or branched C1-C12 alkyl group which is optionally interrupted by an oxygen atom, or R9, R10 and R11 are a group of formula VIII: Image VIII where R12 and R13, independently, are hydrogen or C1-C12 alkyl and p and q, independently, are 0 or an integer ranging from 1 to 10, provided that p and q are not simultaneously 0 and provided that at least one of R9, R10 and R11 is a group of formula VIII; and D) 0-10% by weight of an alkali metal borate; the percentages by weight being based on the total weight of the corrosion inhibitor composition.
Birchall Kevin L.
Minett Michael G.
Ag Ciba-Geigy
Fetherstonhaugh & Co.
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